Magnus induced diode effect for skyrmions in channels with periodic potentials

dc.contributor.authorBellizotti Souza, J. C. [UNESP]
dc.contributor.authorVizarim, N. P. [UNESP]
dc.contributor.authorReichhardt, C. J.O.
dc.contributor.authorReichhardt, C.
dc.contributor.authorVenegas, P. A. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.contributor.institutionUniversity of Antwerp
dc.contributor.institutionLos Alamos National Laboratory
dc.date.accessioned2023-07-29T12:36:47Z
dc.date.available2023-07-29T12:36:47Z
dc.date.issued2023-01-11
dc.description.abstractUsing a particle based model, we investigate the skyrmion dynamical behavior in a channel where the upper wall contains divots of one depth and the lower wall contains divots of a different depth. Under an applied driving force, skyrmions in the channels move with a finite skyrmion Hall angle that deflects them toward the upper wall for −x direction driving and the lower wall for +x direction driving. When the upper divots have zero height, the skyrmions are deflected against the flat upper wall for −x direction driving and the skyrmion velocity depends linearly on the drive. For +x direction driving, the skyrmions are pushed against the lower divots and become trapped, giving reduced velocities and a nonlinear velocity-force response. When there are shallow divots on the upper wall and deep divots on the lower wall, skyrmions get trapped for both driving directions; however, due to the divot depth difference, skyrmions move more easily under −x direction driving, and become strongly trapped for +x direction driving. The preferred −x direction motion produces what we call a Magnus diode effect since it vanishes in the limit of zero Magnus force, unlike the diode effects observed for asymmetric sawtooth potentials. We show that the transport curves can exhibit a series of jumps or dips, negative differential conductivity, and reentrant pinning due to collective trapping events. We also discuss how our results relate to recent continuum modeling on a similar skyrmion diode system.en
dc.description.affiliationDepartamento de Física Faculdade de Ciências Unesp-Universidade Estadual Paulista, CP 473 SP
dc.description.affiliationPOSMAT Programa de Pós-Graduação em Ciência e Tecnologia de Materiais Faculdade de Ciências Universidade Estadual Paulista—UNESP, CP 473 SP
dc.description.affiliationDepartment of Physics University of Antwerp, Groenenborgerlaan 171
dc.description.affiliationTheoretical Division Center for Nonlinear Studies Los Alamos National Laboratory
dc.description.affiliationUnespDepartamento de Física Faculdade de Ciências Unesp-Universidade Estadual Paulista, CP 473 SP
dc.description.affiliationUnespPOSMAT Programa de Pós-Graduação em Ciência e Tecnologia de Materiais Faculdade de Ciências Universidade Estadual Paulista—UNESP, CP 473 SP
dc.identifierhttp://dx.doi.org/10.1088/1361-648X/ac9cc5
dc.identifier.citationJournal of Physics Condensed Matter, v. 35, n. 1, 2023.
dc.identifier.doi10.1088/1361-648X/ac9cc5
dc.identifier.issn1361-648X
dc.identifier.issn0953-8984
dc.identifier.scopus2-s2.0-85141801990
dc.identifier.urihttp://hdl.handle.net/11449/246286
dc.language.isoeng
dc.relation.ispartofJournal of Physics Condensed Matter
dc.sourceScopus
dc.subjectdiode
dc.subjectMagnus
dc.subjectperiodic potentials
dc.subjectskyrmions
dc.titleMagnus induced diode effect for skyrmions in channels with periodic potentialsen
dc.typeArtigo
unesp.author.orcid0000-0002-2735-615X 0000-0002-2735-615X[2]
unesp.author.orcid0000-0002-3487-5089[3]

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